AusCERT - ESB-2006.0301 -- [Win][Linux][HP-UX][Solaris][AIX] -- Sun Java System Directory Server: Denial of Service May Occur Due to Large Memory Allocation for Specific LDAP Requests

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ESB-2006.0301 -- [Win][Linux][HP-UX][Solaris][AIX] -- Sun Java System Directory Server: Denial of Service May Occur Due to Large Memory Allocation for Specific LDAP Requests
Date: 17 April 2007

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             AUSCERT External Security Bulletin Redistribution

            ESB-2006.0301 -- [Win][Linux][HP-UX][Solaris][AIX]
Sun Java System Directory Server: Denial of Service May Occur Due to Large
               Memory Allocation for Specific LDAP Requests
                               17 April 2007

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:              Sun Java System Directory Server 5.2
Publisher:            Sun Microsystems
Operating System:     AIX
                      HP-UX
                      Linux variants
                      Solaris
                      Windows
Impact:               Denial of Service
Access:               Remote/Unauthenticated
CVE Names:            CVE-2006-0647

Original Bulletin:    
  http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-26-102294-1

Revision History:  April 17 2007: Updated patches are available - 5.2patch5
                   June  16 2006: Sun updates affected versions
                   April 28 2006: Initial Release

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Sun(sm) Alert Notification
     * Sun Alert ID: 102294
     * Synopsis: Sun Java System Directory Server: Denial of Service May
       Occur Due to Large Memory Allocation for Specific LDAP Requests
     * Category: Security
     * Product: Sun Java System Directory Server 5.2
     * BugIDs: 6384310
     * Avoidance: Patch
     * State: Resolved
     * Date Released: 26-Apr-2006, 19-May-2006
     * Date Closed: 19-May-2006
     * Date Modified: 19-May-2006, 13-Apr-2007

1. Impact

   A local or remote unprivileged user may be able to prevent an LDAP
   server from responding to LDAP client requests. This is a Denial of
   Service (DoS) as LDAP clients referencing the LDAP server may
   experience hangs or slow performance. Users may no longer be able to
   login on affected LDAP client systems.

   This issue is also described in CVE-2006-0647 at
   http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-0647

2. Contributing Factors

   This issue can occur in the following releases for all platforms
   (Solaris 8, 9, and 10 on Solaris SPARC and Solaris x86 Platforms,
   Linux, Windows, HP-UX, and AIX):

   Native Package Versions:
     * Sun ONE Directory Server 5.2
     * Sun Java System Directory Server 5 2003Q4 (5.2patch1)
     * Sun Java System Directory Server 5 2004Q2 (5.2patch2)
     * Sun Java System Directory Server 5 2005Q1 (5.2patch3)
     * Sun Java System Directory Server 5 2005Q4 (5.2patch4)

   without patch 122476-01

   PatchZIP (Compressed Archive) versions:
     * Sun One Directory Server 5.2
     * Sun Java System Directory Server 5.2 Patch2
     * Sun Java System Directory Server 5.2 Patch3
     * Sun Java System Directory Server 5.2 Patch4

   without patch 122476-01

   Note: Sun ONE Directory Server 5.1 and earlier versions are not
   affected by this issue.

   To determine the version of Directory Server running on a system, the
   following command can be used:
    $ cd <installation directory>/bin/slapd/server[/64]
    $ ./ns-slapd -V -D <instance-directory>

3. Symptoms

   Should the described issue occur, the LDAP server will no longer
   respond to client LDAP requests. The LDAP server process, ns-slapd,
   may not be running on the LDAP server. If the LDAP server process is
   no longer running, there may a message similar to the following about
   failing to calloc a random number of bytes in the error log:
    ERROR<5135> - Resource Limit - conn=-1 op=-1 msgId=-1 -
    Memory allocation error calloc of 8248 bytes failed; errno 11 

4. Relief/Workaround

   There is no Workaround for this issue. To recover from an unresponsive
   LDAP server instance, the following command can be used to restart the
   LDAP server process:

   On UNIX systems (usually as root user):
    # <server instance path>/start-slapd

   On Windows systems, open the "Services" panel and start the service
   manually.

5. Resolution

   This issue is addressed in the following releases for all platforms
   (Solaris 8, 9, and 10 on Solaris SPARC and Solaris x86 Platforms,
   Linux, Windows, HP-UX, and AIX):
     * Sun Java System Directory Server 5 2005Q4 (Native Package) with
       patch 122476-01 or later
     * Sun Java System Directory Server 5.2 Patch4 (Compressed Archive)
       with patch 122476-01 or later

   Note: Versions previous to Sun Java System Directory Server 5 2005Q4
   or Sun Java System Directory Server 5.2 Patch4 must be upgraded to
   these versions before applying the patch.

   This issue can also be addressed by upgrading to Directory Server
   5.2patch5 by applying the following patches:

   For the Native Package Versions:
     * Solaris Sparc: 115614-27
     * Solaris x86: 115615-27
     * Linux: 118080-12
     * HP-UX : 121393-02
     * Windows : 121392-03

   For the PatchZIP (Compressed Archive) versions:
     * Solaris Sparc: 117665-04
     * Solaris x86: 117666-04
     * Linux: 117668-04
     * Windows: 117667-04
     * HP-UX: 117669-04
     * AIX: 117670-04

Change History

   19-May-2006:
     * Updated Contributing Factors and Resolution sections

   13-Apr-2007:
     * Updated Resolution section

   This Sun Alert notification is being provided to you on an "AS IS"
   basis. This Sun Alert notification may contain information provided by
   third parties. The issues described in this Sun Alert notification may
   or may not impact your system(s). Sun makes no representations,
   warranties, or guarantees as to the information contained herein. ANY
   AND ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION
   WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR
   NON-INFRINGEMENT, ARE HEREBY DISCLAIMED. BY ACCESSING THIS DOCUMENT
   YOU ACKNOWLEDGE THAT SUN SHALL IN NO EVENT BE LIABLE FOR ANY DIRECT,
   INDIRECT, INCIDENTAL, PUNITIVE, OR CONSEQUENTIAL DAMAGES THAT ARISE
   OUT OF YOUR USE OR FAILURE TO USE THE INFORMATION CONTAINED HEREIN.
   This Sun Alert notification contains Sun proprietary and confidential
   information. It is being provided to you pursuant to the provisions of
   your agreement to purchase services from Sun, or, if you do not have
   such an agreement, the Sun.com Terms of Use. This Sun Alert
   notification may only be used for the purposes contemplated by these
   agreements.

   Copyright 2000-2006 Sun Microsystems, Inc., 4150 Network Circle, Santa
   Clara, CA 95054 U.S.A. All rights reserved

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===========================================================================
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